A 90 day supply of my concentrated insulin (in pen form) is just under $11,000.00 retail. With insurance, it's an $80.00 copay. The same insulin in vials is $25.00 (with coupon) for 30 days, and that's how it is used in my insulin pump. However, supplies for my insulin pump (reservoirs to hold the insulin, infusion sets, and CGM sensors) is over $2,000.00 for 90 days, even after insurance. Because of this, I'm going off the pump and back on the shots. The pump supplies are only available through the pump manufacturer, and they set the prices. It's insane.